The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Nov. 15, 2005
Filed:
Jun. 27, 2003
Applicant:
Takashi Hasegawa, Mattou, JP;
Inventor:
Takashi Hasegawa, Mattou, JP;
Assignee:
Murata Manufacturing Co., Ltd., Kyoto, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H01P001/36 ;
U.S. Cl.
CPC ...
Abstract
A two-port isolator capable of suppressing propagation of the second harmonic wave () or the third harmonic wave () of the used frequency f includes a parallel RC circuit, which includes a first matching capacitor and a resistor, and the parallel RC circuit is electrically connected between an input port Pand an output port P. A series resonant circuit including a second matching capacitor and an inductor is electrically connected between the output port Pand ground. The resonant frequency of the series resonant circuit is set between the frequencies of the second and third harmonic waves.